FILE EXTENSION and FILE FORMATS
the various file types encountered in SIMIND are listed in the following sections.
On Unix systems all file names are in lower case!
Input files used by SIMIND
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*.cr3
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Represent table listings of cross-sectional data for various
materials. These files are written in ASCII and have an obscure
file format. The first four floating values in the first record are
the density for the material, the highest atomic number in the
compound and the corresponding K- a energy and fluorescence
yield for that material. The next value is an integer and is the
number of cross-section values in the four columns below. The
four additional floating values are reserved for future
development of pile-up simulations. The different cross-sections
for photo absorption, Compton, coherent and pair production are
then tabulated in column form. Last, atomic form factors and
the incoherent scatter functions are tabulated in a special
compressed format.
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*.dmi
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Represent a binary density map file used to generate a non-
homogeneous phantom. These files should be in an INTEGER*2
format with 64x64 sized matrices. The pixel cell in the upper left
corner should be [1,1]. SIMIND reads it using a record length of
128 [VMS and ULTRIX/UNIX] and 512 [MicroSoft]. Access is
DIRECT and form is UNFORMATTED. The density of the phantom
should be a factor of 1000, i.e. for water [r=1.0 g/cm3], a pixel
value of 1000 should be used.
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*.smc
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Represent a listing of the input data created by the program
CHANGE. This file is an ASCII file that contains the information
defined in the CHANGE program. It has a very defined format and
should not be changed.
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*.win
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File that include the window settings used by the scattwin
progran, Each row is one window with lower and upper energy
threshold in keV.
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*.inp
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Represent a file that stores input data used by certain score,
source and isotop routines. The format may depend on the
routine but it is suggested to use the proper extension for
clarity.
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*.smi
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Represent a binary source distribution. These files are similar in
format to the files for the density maps [*.DMI] but represent a
source distribution instead of an arbitrary density distribution.
These files should be in an INTEGER*2 format with 64x64 sized
matrices. The pixel cell in the upper left corner should be [1,1].
SIMIND reads it using a record length of 128 [VMS and
ULTRIX/UNIX] and 512 [MicroSoft]. Access is DIRECT and form is
UNFORMATTED.
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Output files created by SIMIND
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*.a*
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Represent the results of simulated SPECT projections. This binary
file consists of projection data in REAL*4 format. The file
contains either 64x64 matrices defined as MTX[1,1] in the upper
left corner or a sinogram where the first row is the projection
data for the first projection angle. For the non- sinogram
situation, the SPECT file is written using an equivalence one-
dimensional REAL*4 array[NRPROJ*8192]. Record length is 128
longwords [VMS and ULTRIX/UNIX] or 512 byte [MicroSoft].
Access is DIRECT and form is UNFORMATTED.
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*.bim
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Represent a binary matrix image created by the output of
SIMIND. This file is a REAL*4 binary file. It contains a 64x64
matrix defined as MTX[1,1] in the upper left corner. The file is
read and written using an equivalence one- dimensional REAL*4
array[4096]. Record length is 128 long words [ULTRIX/UNIX] or
512 byte [MicroSoft/Linux]. Access is DIRECT and form is
UNFORMATTED.
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*.bis
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Represent a binary energy spectra image created by the output
of SIMIND. This file is a REAL*4 binary file and contains a
spectrum of 512 channels. The first channel is the keV/channel
while the others represent the actual energy distribution. The
channels are equally spaced and the keV/channels can therefore
be used to create an ASCII file for plotting. The data was
written using a REAL*4 array[512]. Record length is 128 long
words [ULTRIX/UNIX] or 512 byte [MicroSoft/Linux]. Access is
DIRECT and form is UNFORMATTED.
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*.res
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Represent the results of the basic detector parameters
calculated from the simulation. It also contains input parameters
and statistics of the simulation.
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*.hdr, *,h00
*.csv
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Ascii file including header information for the Interfile v3.3 file
format.
A comma-separated file useful for importing to spreadsheets like
Excel. Created by Index 84.
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Internal data files used by SIMIND and CHANGE
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*.a
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Represents a library of compiled object files [UNIX-version].
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*.col
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Represent the collimator data-base file COLLIM.COL. This file is
stored in the special SMC directory. Description and listing of the
default file are shown in Appendix A.
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*.key
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Files containing Interfile v3.3 keys as defined by reference $.
SIMIND specific keys starts with two ;; characters
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*.lib
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Represent a library file of compiled object files for the DOS-
version that is used to build the SIMIND program from the
various subroutines.
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*.num
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Represent files consisting of random numbers used to initialize
the random number generator.
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*.ini
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The initialization files used to re-define some of the default
values. Can reside in local directory and i the special smc_dir
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*.txt
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Help files used by the CHANGE program.
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*.err
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Error file for SIMIND
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